Hypodermic syringe



Jan. 1, 1952 CASIMIRO DEL TORAL ARRIETA HYPODERMIC SYRINGE wed Oct 28 1948 i QaiiaEIliiiiIrii-I IJHH I M Eva-(W s n s] Patented Jan. 1, 1952 OFFICE HYPODERMIC SYRINGE Casimiro del Toral Arrieta, Buenos Aires,

Argentina Application October 28, 1948, Serial No. 56,977

This invention relates to hypodermic syringes in general and more especially to a new type of syringe of manifold use. It is a well known fact that the different injecting substances are administered by dose which differ from one another to a great extent; both'physicians and assistants who have to carry out that duty are frequently forced to change syringes in order to apply the correct gradation; besides throughout their daily tasks they are often obliged to use different thickness'es and lengths of hypodermic needles. This situation seems unavoidable, bearing in mind the actual condition of the numerous cases they should attend to. However this change of needles would not bring about any serious trouble if all said types were adapted to available types of syringes which are of various sizes. There the problem gets worse, for there are no standards or fittings at the tops of the same, so that the physician has to use so-called intermediaries, which are simply adapting couplings fitting with one of their ends to a definite syringe top and with the other end to a larger or smaller type. Consequently a physican has not only to keep a good assortment of syringes and needles, but he must displaceable over said outer portion and held in place by a bolt attached to a clamp; and, having a longitudinal opening in order to allow only one of the scales to be seen, thus leaving the other scales unseen, so no confusion could arise on the doctor or assistants side regarding the scale 'applied. To carry out the selection of the scale, there is a smaller opening over the above mentioned longitudinal space which allows the indicia of the injected substance to be seen printed on the glass of the syringe. This invention supplies a top which is formed by a succession of stepshaped conical portions, the calibers of which correspond to the different types of needle fittings that are to be found in the market.

Taking into account that needle fittings are deep enough and that a surface for contact not greater than 1% to 2 mm. is sufficient, the arrangement introduced by this invention allows attachment of any needle type to the syringe supplied with this kind of top. Likewise, in order to -2 Claims. (01. 128-218) enable its application on syringes in use at'pres ent, two devices are supplied consisting of a stepshaped top which may be fitted to syringe tops used today, while at the same time strengthening V the same.

As an addition to said substantial improvements, a perforation is provided in the handle of the plunger in order to allow housing'of at least one hypodermic needle, inside said plunger in order to be disinfected together with the syringe. In order to get a clear idea of the invention, a detailed description of the same with reference to the accompanying drawings is given as follows:

Fig. 1 is a view of the improved syringe.

"Fig. 2 is a view of the plunger of the syringe.

Fig. 3 represents an adaptor or intermediaryv on which an improved top has been supplied, said: adaptor being attached to the syringe by means of plaster. v

Fig. 4 represents a similar adaptor to the one shown in Fig. 3, but'interchangeable and adapted to provide a temporary attachment. "1 ,In all these figures reference numbers indicate equal or corresponding portions. Referring to the accompanying drawings, this invention consists of a syringe I, of the usualtype used for injections of manifold scales 2 arranged in a convenient way along the surface of the syringe, which is covered with a jacket 3 of a suitable or convenient material; said jacket having a longitudinal opening 4 that allows only one of the various scales of the syringe to be seen. Said jacket may be displaced laterally over the surface of the syringe and is held in place by a bolt 5 attached to a clamp or the like 6, which is guided in a peripheral slot 1 in said jacket 3. Another window-shaped opening 8, shows the name of the product corresponding to the scale at sight, printed on the glass.

A protrusion 9 makes the jacket turn without any difficulty. Plunger H), has on its upper portion one or several openings ll, providing space for, at least, one hypodermic needle l2.

The tip of the syringe is made up of several frusto-conical step portions l3, of a suitable length to the object of this invention, said tip being traversed by a longitudinal channel l4. By means of this arrangement, any of the calibers of needle fittings can be mounted on the syringe. for if it is of a small caliber it will fit the cone at the end, while if it is of a larger caliber it will fit one of the following cones, while the total length of this cone arrangement is not greater than the length of the cavity provided in the fitting of the needles nowadays used.

Taking into account the need of supplying a which can be attached to the top of the syringe.

The operation of the scales is very simple. When the substance to be injected is known, all one has to do is to turn the jacket till the scale corresponding to said substance is visible and then proceed to inject in the usual Way.

In case another substance is to be injected, the syringe should be first disinfected and then operated in the way already described, i. e. checking the corresponding scale and injecting the required-dosa Placing of the needle inside the plunger allows to keep the syringe ready for an. urgent operation. without running the risk of breaking the needle, since the inside of the plunger is generally hollow;

The number of scales printed on the surface of the-syringe will only be limited by space, but generally two or more scales could be printed, without the reading opening becoming too narrow.

Definite scales; are-not. hereby specified, for they willv be indicated in accordance with. a scientific conception and based on practical issues.

This invention is not restricted to the example described and represented above, for different alterations could be introduced in. form or detail which. can be included in the scope of the following claims.

I. claim 1. A hypodermic syringe comprising an elongated hollow syringebody having a movable plunger inserted. from one end thereof. and a series of quantitative indicia inscribed along the sides thereof; a jacket for rotatably enclosing the syringe body having a longitudinal. slot of predetermined length in the wall thereof through which the indicia may be viewed; and a relatively smaller viewing window spaced from the end of said slot through which to view the injection material within the syringe body; means for securing said syringe body in a selected position projecting into the jacket to expose a predetermined portion of said quantitative indicia adjacent to the end of said longitudinal slot; and an end portion on the syringe formed'with a plurality of successively smaller frusto-conical step portions extending from the other end of said jacket outwardly to the extremity of said end portion.

2. A hypodermic syringe comprising an elongated hollow syringe body having a movable plunger inserted from one end thereof and a series-of quantitative indicia inscribed along the sides thereof; a jacket for rotatably enclosing the syringe body having a longitudinal slot of predetermined length in the wall thereof through which the indicia. may beviewed; means for securing, said syringe body in. a. selected. position projecting into the jacket. to expose a predetermined portion of said quantitative indicia adjacent to the end of said. longitudinal slot; and, an additional end portion attached to the syringe formed with a plurality of successively smaller frusto-conical step portions extending. from the other end ofsaid jacket outwardly to the extremity of said end portion.

CASIMIRO DEL. TORAL ARRIETA.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS.

Number Name Date 330,621 Reichardt Nov. 17', 1885. 1,180,051 Laurent Apr. 18, 1916 1,456,717 Smith et a1 May 29., 1923 1,471,644 Bandman Oct. 23, 1923 FOREIGN PATENTS Number Country Date.

505,212 Great Britain May 8, 1939 

